Bump mermaid from 8.4.8 to 9.1.2

Bumps [mermaid](https://github.com/knsv/mermaid) from 8.4.8 to 9.1.2.
- [Release notes](https://github.com/knsv/mermaid/releases)
- [Changelog](https://github.com/mermaid-js/mermaid/blob/develop/CHANGELOG.md)
- [Commits](mermaid-js/mermaid@8.4.8...9.1.2)

---
updated-dependencies:
- dependency-name: mermaid
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]